Dust-collector for rock-drills.



E. F. GALLIGAN.

DUST COLLECTOR FOR ROCK DRILLS. 'APPLIOATION FILED SEPT. 16, 1912.RENEWED MAY 7, 1914. 1 1 24:,605

Patented Jan. 12, 1915.

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v avwcmfoz Emma? 6 a @ajazz iHE NORRIS PETERS 60.. FHOTC-LITHQ.WASHINGTUN. D. c.

E. FfGALLIGAN. DUST COLLECTOR FOR ROCK DRILLS. APPLICATION FILED SEPT.16, 19-12. RENEWED MAY 7, 1914.

j 1,124,605 Patented Jan. 12, 1915.

mw f? HE NORRIS PETERS 60., PHOTO-LITHO.v WASHINGTON, D C.

EMME'I" F. GALLIGAN or man HENRY E. woonwann, or 30E O SPRINGS,COLOBADO, ASSIGNOB OF ONE-EAL? TO NVER, COLORADO, AND ONE-FOURTH T0WILLIAM H.

GALLIGAN, OF IDAHO SPRINGS, COLORADO.

greases.

Application filed DUST-COLLECTOR FOR ROGK-DRILLS.

Specification of Letters Patent.

1 b all whom it may concern Be it known that I, Einunr F. GALLIGAN,

a citizen of the United States, residing at ldaho Springs, county Stateof Colorado,

of Clear Creek, and. have invented certain new and useful Improvementsin Dust-0ollectors for Rock-Drills;

and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same,

reference being had t drawings, and to reference marked thereon,

o the accompanying the letters and figures of which form a ner that atube or conduit leading from the hoiiising conducts the dust to thebottom of the drift and quietly deposits it.

One object of my invention is to provide a construction in which thehousing shall be held against the breast of the rock by spring pressure.

Another object is to provide a guide whi 3h may be readily detache dfrom the drill steel and to which the bottom of the housing is secured.

Other objects will a ppear hereinafter as illustrated in the acco inwhich:

Figure 1 is a vertical a drift or tunnel mpanymg drawings,

section taken through showing a rock drill in place and my improved dustcollector connected in operative relation therewith. Fig. 2 is ahorizontal section taken on the line 2-2, Fig. 5, looking downwardly,the parts being shown on a larger scale than in Fig. 1.

11 3 is a similar s line 8-3, Fig. 5, looki on the same scale as ectiontaken on the rig downwardly, and Fig. 2. Fig. t 18 a section taken onthe line d%, Fig. 5, looking upwardly. Fig.

5 is a sectional view oi the housing with parts of the guide sectioned,the rest of the in elevation, and on th 3 and 4-. Fig. 6 is a devicebeing shown e same scale as Figs. section taken on the Patented Jan. 12,1915.

September 16, 1912, Serial No. 796,354. Renewed May 7, 1914. Serial No.837,071.

line 6-6, Fig. 3, showing the guide in section and the drill steel inelevation. Fig. 7 is a section taken on the line 7-7, Fig. 3.

The same reference characters indicate the same parts in all the views.

7 Let the numeral 5 designate a rock drill mounted in a drift 6, thedrill being in an upright position. The drill steel 7, as illustrated inthe drawing, passes through a housing 8 which is composed of flexiblematerial, preferably canvas, the housing merging into a conduit 9 forcarrying the dust to the bottom 1 of the drift or tunnel, where itescapes without raising any dust.

The conduit proper is offset from the housing on one side, as shown at10, and the housing has an opening at this offset, and the bottom of thehousing, at this opening, is clamped between the jaws 12 and 13 of aguide and washer members 14- and 15 which cooperate with flanges 16 and17 formed on the jaws of the guide, to secure the latter to the housing,the washer plates let and 15 being connected with flanges 16 and 17 bymeans of screws 18 which are secured by nuts 19. The bottom of thecanvas is desig nated by the numeral 20.

The jaws 12 and 13 are provided with cooperating members 21 and 22 whichconform to the shape of the drill steel 7 around which they fit closelywhen the jaws are closed. These jaws are pivoted on the shank member 23of a screw-eye 24.- which passes through registering openings inextensions 24- and 25 of the said jaws. These extensions are equippedwith short pins 26 which enter the opposite extremities of a spiralspring 27 which is normally under tension to open the jaws as soon asthe handle mem bers 28 and 29 are released. When the drill is inoperation these handle members are locked in position to close the parts21 and around the drill steel. As illustrated in the drawing, a keeper80, constituting a sort of hook, pivoted as shown at 31 in one handlemember and extending downwardly whereby when thrown into the properposition it holds the two handle members in contact. The extensions 24and 25 of the jaws of the guide, on the side of the parts 21 and 22opposite the handle members, are crossed, so that when the handlemembers are released the action of thespring 27 is to open the handlemembers and the parts 21 and 22 whereby the drill steel is released. Inorder to prevent the jaws from inclependent movement in a verticaldirection when they are in the closed position, the jaw 13 is providedwith a lip 3 overlapping the handle member of the jaw 12 adjacent theparts 21 and 22; while the washer member 15 passes beyond, as shown at33, the joint 32 between the jaws when the latter are closed. By virtueof this arrangement the lip 3 prevents the jaw 12 from moving upwardlyfrom its companion jaw, while the overlapping part 33 of the washer 15breaks the joint at this point and thereby assists in preventing leakageof dust.

. Above the guide is located a yoke 3st having arms 35 which extend onopposite sides of the drill steel, the closed extremity 36 of the yoke,which is somewhat elongated for the purpose, extending through anopening 37 in the housing, thus exposing a portion of the yoke when thedevice is in use. The inner extremities of the yoke arms are bentinwardly toward the drill steel, as shown at 60, and these extremitiesmerge into vertically disposed leaf spring members 38 w ich, when thedevice is applied and during the operation of the drill, are arrangedapproximately in parallel relation, the said leaf spring membersextending into the drill hole 39. These leaf spring members 38 arerelatively strong and have a tendency to separate and normally springapart from each other when not under restraint, whereby they graduallydiverge from each other from their yoke extremities upwardly. In orderto insert them in the drill hole after the latter is started, I apply akeeper .10 consisting of an approximately rectangular band havingrecesses 2 in two opposite sides adapted to receive'the leaf springmembers 88 and acting as guides to maintain the keeper in the properposition. This keeper maintains the relatively strong leaf springmembers in an approximately parallel position and so confined as toallow their points to be introduced to the drill hole. As the springmembers are crowded into the hole, the keeper is moved downwardlythereon and drops to a position in proximity to the yoke, thus allowingthe tension or tendency of the members 38 to spring outwardly to act,whereby these members tightly engage the wall of the drill hole onopposite sides and maintain the yoke in place.

A spiral spring 41 surrounds the drill steel and the leaf spring members38. The outer extremity of this spiral spring, or the extremitylowermost when in use, is connected with the yoke 34 on opposite sides,the lowermost convolution d2 of the spiral spring being coiled aroundpins 43 applied to the yoke, thus anchoring the lower extremity of thespiral spring. The lower terminal of this spring is fastened, as shownat 44 to prevent any tendency of the spring to uncoil. The upperextremity of this spring is connected with the outer end of the housing,as shown at 45. In ore er to form this connection, the upper extremityof the housing is passed over the uppermost convolution 46 of the springfrom the out side and drawn downwardly a short distance as shown at 47.then applied to the part 47 of the housing whereby the latter is clampedbetween this ring and the convolution 46 of the spring. This spring ring48 is provided with outwardly extending hooks 49 which overlap andextend downwardly upon the outside of the housing. In this way thehousing is securely connected with the outer extrem ity of the spiralspring. The spring ring i8 is divided, as shown at 50, and acts in thewell-known manner of a ring of this character. The spring ring, togetherwith the upper extremity of the housing, when extended, is considerablylarger than the drill hole, whereby the housing is caused to closelyengage the breast of the rock around the drill hole when the device isin use. It will be understood that the crowding of the leaf springmembers 38 into the drill hole by upward pressure on the yoke, willcompress the spiral spring, whereby the latter is placed undersuflicient tension to force the upper extremity of the housing into suchproximity to the breast of the rock around the drill hole as to preventthe escape of dust or rock cuttings when the drill is in use.

In order toconnect the drill steel guide composed of the jaws 12 and 13,as heretofore explained, with the a chain 51 or other suitable flexibledevice is employed. The upper extremity of this chain is provided with aring 52 through which one convolution of the spring 41 passes, while thelower extremity of the chain is connected, as shown at 53, with the eye5% of the screw 23. The object of this chain is to overcome the tendencyof the lower part of the hood where the jaws are located to workdownwardly on the drill steel when the drill is in peration. It will beunderstood that as the clamping jaws through which the drill steelpasses are composed of metal, there is a considerable tendency of thelower part of the hood to work downwardly as the drill steel. is drivenupwardly into the rock.

It should also be understood that where a dust collector of thischaracter is employed, an important use of the same is in connectionwith drills arranged for the forming of up holes, whereby the ofinclination is suiiicient to cause the rock outtings to pass out of thehole by gravity. Hence, under such circumstances, the drill A springring 48 is spiral spring 41,

lit!

steel when in operation, is always working up through the jaws of thehood and the upward movement, under the influence of the powerful andrapid blows of the hammer of the drill, continues through the jaws, eventhough the latter are adjusted to cause the bushing to tightly grip thedrill steel to form a dust tight joint. Hence, it is found in actualpractice that there is no tendency on the part of the hood to which thejaws are attached to move upwardly with the drill steel, the fact beingthat the opposite result exists, as heretofore explained, and in theabsence of a support such as the chain 51 or its equivalent, thisdownward pull upon the lower part of the canvas would soon result inseparating this portion of the canvas to which the jaws are attached,from the upper portion, particularly under the influence of the twistingstrain to which the hood is subjected as the result of imparting partialrotations in reverse directions to the drill steel during the drillingoperation.

l/Vhen my improved apparatus is applied, as illustrated in Figs. 1 and5, the bottom of the housing where the drill steel guide is located, isclosed so tightly as to prevent the escape of any appreciable amount ofdust or rock cuttings. Just above the bottom of the housing, and on oneside thereof, a relatively short vertically disposed slit is formed inthe housing through which the handle members 28 and 29 of the drillsteel guide protrude. The housing adjacent this slit is provided withcanvas loops 56 arranged to slip over the handles 28 and 29 of the guidewhen the latter is in place, thus further aiding in the connection ofthe guide with the housing and having a tendency to support the guide inthe proper position with relation to the other parts of the structure.These loops are secured to the body of the housing by stitching orsewing them thereto as shown at 57, or in any other suitable manner.

In the event that any rock cuttings or pulverulent material shall workinto the slight space or clearance 58 between the parts 21 of the aws 12and 18, this material will have a tendency to work out through openings59 formed in the parts 21 and 22 intermediate their upper and lowerextremities, and thus pass into the housing and thence downwardlythrough the tube or conduit 9 with the other rock cuttings. Thisclearance 58, however, is so small that the drill steel may be said tofit closely within the jaws as heretofore explained, still, the guidedoes not travel with the drill steel as the latter works its way intothe rock and consequently there must be a slight clearance in order toallow the drill steel to move longitudinally, independently of theguide. The guide, however, has a limited degree of vibration in avertical direction, thus reliev ing it from any considerable wear andalso from any appreciable friction with the drill steel. The guide, inaddition to the functions heretofore ascribed to it, also has a tendencyto maintain the lower part of the housing as well as the conduit 9 where1t merges into the housing, in the expanded position, whereby the rockcuttings pass downwardly through the conduit as they enter the housing,thus preventing any accumulation of debris within the housing whichmight interfere with the proper operation of the device.

From the foregoing description, the use and operation of my improveddust collec' tor for rock drills will be readily understood.

Assuming that the drill is in place within the drift or tunnel, asillustrated in Fig. 1,

and that the housing is in position and properly connected with thedevice, as heretofore explained, the drill steel is passed through theguide and upwardly to the breast of the rock. It will be understood thatbefore my improvement is applied, the drill hole must be startedsufficiently to permit the entrance of the leaf spring members 38, sincethis retaining device is of the utmost importance in maintaining theapparatus in proper position. After, however, the drill hole has beenstarted, the leaf spring members 38 are crowded into the entrance of thehole a suflicient distance for the purpose, the spiral spring ll beingat the same time compressed and placed under sufiicient tension by themovement of the yoke 3% toward the breast of the rock, to hold the upperextremity of the housing and its connections tightly against the breastof the rock around the drill hole to prevent the escape of rock cuttingsas the drilling operation proceeds.

In applying the device to the housing, the same may be introduced fromthe top. The guide will then assume the lowermost posi tion in thehousing with its handle members protruding through the slit 56. Thebottom of the housing around the hole therein is then applied to thelower surface of the flanges 16 and 17, which together are heart-shapedin plan view, (see Fig. 3,) after which the washer members 14: and 15are applied to the housing from below, after which the fastening screws18 are put in place, thus practically closing the bottom of the housing.Assuming that the loops 56 have been passed over the protruding handleextremities of the jaws 12 and 13, the guide is then in position foruse. The connection of the upper extremity of the housing to the spiralspring l1 has already been suiiiciently explained.

The device being ready for use, the drill is started and the rockcuttings, as they fall from the drill hole, pass downwardly and thencethrough the conduit 9, being discharged from the lower open extremity ofthe conduit at the bottom of the drift or tunnel, as heretoforeexplained.

The construction herein disclosed comprising a hood, a spiral springengaging the hood, and means independent of the drill for supporting thespring and acting through the agency thereof to support the hood inplace, the axis of the spring being substantially coincident with theaxis of the hood, is broadly claimed in my copending application, SerialNo. 772,298, filed June 7, 1918.

Having thus described my invention, What I claim is:

1. The combination of a housing arranged to surround the drill hole,means for expanding the housing where it engages the rock around thedrill hole, a yoke having parts resiliently engaging the walls of thedrill hole for securing the yoke in place, and a spiral springinterposed between the yoke and the housing-expanding means.

2. The combination of a flexible housing, expanding means applied to theupper tremity of the housing where it surrounds the drill hole, a yoke,arms connected with the yoke and extending therefrom approxi mately atright angles to the plane of the yoke, the said arms being adapted toenter the drill hole to resiliently engage the walls thereof, while theyoke extends beyond the hole, and a spring interposed between the yokeand the housing-expanding means.

The combination or a housing, a yoke having relatively strong leafspring arms adapted to resiliently engage the walls of the drill hole,the said arms extending at right angles to the plane of the body of theyoke, and a spiral spring interposed between the yoke and the upperextremity of the housing and arranged to be placed under tension as thespring arms are forced into the drill hole by upward pressure on theyoke.

i. The combination of a housing, a yoke having spring arms arranged toenter the drill hole whereby the yoke is retained in a predeterminedposition with reference to the breast of the rock, and a spiral springlocated within the housing and having one extremity connected with theouter extremity of the housing while the opposite extremity engages theyoke.

The combination of a housing, a yoke composed of. a body member, andspring arms extending approximately at right angles to the body memberand adapted to resiliently engage the walls of the drill hole, and aspiralspring interposed between the upper extremity of the housing andthe yoke.

6. In a dust collector for rock drills, the

combination of a housing, a yoke composed of a body member, and springarms extending at right angles to the body member and adapted toresiliently engage the walls of the drill hole, 'a spiral springinterposed between the body of the yoke and the outer extremity of thehousing, the spring arranged to be placed under tension as the springarms are crowded into the drill hole by upward pressure on the body ofthe yoke, a guide applied to the bottom of the housing and arranged toclosely surround the drill steel, and a flexible connection between saidguide and spiral spring, substantially as described.

7. The combination with a housing, of means for securing the housingagainst the breast of the rock around the drill hole, the housing havingan opening at the bottom and a guide applied to the bottom of thehousing and composed of pivoted jaws to which the parts of the housingadjacent the opening are secured, the jaws having an opening throughwhich the drill steel passes, the jaws being crossed at the pivot andhaving extensions in both directions, a spring interposed between theextensions at one end, and means applied to the opposite extensions forlocking the jaws in the closed position against the tension of saidspring.

8. The combination of a housing, means for securing the housing againstthe breast of the rock around the drill steel, said means including ayoke, and leaf spring members adapted to enter the drill hole, the yokehaving a part exposed through an opening in the housing, and a guideapplied to the bottom of the housing and composed of jaws having anopening through which the drill steel passes, the inner extremities ofthe jaws having extensions, a spring interposed between said extensions,the jaws being pivoted and crossed at the pivot, the jaws also havinghandle members exposed through an opening in the housing, and meansapplied to the handle members for locking the jaws in the closedposition and against the tension of the said spring.

9. The combination of a hood having an opening in the bottom to reecivea drill steel, the hood being equipped with jaws located in the saidopening and applied to the drill steel to form a dust tight joint, aspiral spring applied to the hood, means connected to the spring forholding the hood in place against the breast of the rock around thedrill hole, and a flexible connection between the said aws and thespring to prevent the weight of the aws from injuring the hood.

10. The combination of a hood, a spiral spring applied to the hood,means connected with the spring for holding the hood in place againstthe breast of the rock around the drill hole, the hood having an openingin the bottom provided with jaws to receive the drill steel, and aflexible connection between. said jaws and the spring for thepurpose'set forth.

11. The combination of a hood, a spring applied to the hood, meansconnected With the spring for holding the hood in place around the drillhole, the hood having an opening in its bottom equipped with jawspivoted to clamp the drill steel to form a In testimony whereof I afliXmy signature in presence of two Witnesses.

EMMET F. GALLIGAN.

Witnesses:

E. J. SLATER, W. H. GALLIGAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents- Washington, D. C.

